Ontologically three-dimensional reality violates experiment

We expose a contradiction between experiments that establish clock retardation with the twin paradox, and the idea that (absolute and/or relative) past and future have an ontological physical status that differs from the realism we associate with the present here and now. We also demonstrate that a realistically three-dimensional (3D) “present” universe and a realistically four-dimensional (4D) one are not merely different interpretations or coordinations of the world, but are indeed different ontologically. For example, in contrast to 3D, 4D can explain retroaction, nonlocality, the atomicity of action, and various other fundamental phenomena. Our demonstration does not depend on relativity theory.